Joomla : Security Vulnerabilities, CVEs, Published In 2010 (XSS) CVSS score >= 4

Cross-site scripting (XSS) vulnerability in Joomla! 1.5.x before 1.5.21 and 1.6.x before 1.6.1 allows remote attackers to inject arbitrary web script or HTML via vectors involving "multiple encoded entities," as demonstrated by the query string to index.php in the com_weblinks or com_content component.

Multiple cross-site scripting (XSS) vulnerabilities in the back end in Joomla! 1.5 through 1.5.17 allow remote attackers to inject arbitrary web script or HTML via unknown vectors related to "various administrator screens," possibly the search parameter in administrator/index.php.

Cross-site scripting (XSS) vulnerability in the Artist avenue (com_artistavenue) component for Joomla! and Mambo allows remote attackers to inject arbitrary web script or HTML via the Itemid parameter to index.php.